# -*- mode:python -*-

# Copyright (c) 2014, 2016 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder.  You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Andreas Sandberg

from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *
from Device import PioDevice
from PciDevice import PciDevice


class VirtIODeviceBase(SimObject):
    type = 'VirtIODeviceBase'
    cxx_header = 'dev/virtio/base.hh'
    abstract = True

    subsystem = Param.UInt8(0x00, "VirtIO subsystem ID")

    system = Param.System(Parent.any, "system object")

class VirtIODummyDevice(VirtIODeviceBase):
    type = 'VirtIODummyDevice'
    cxx_header = 'dev/virtio/base.hh'

class PciVirtIO(PciDevice):
    type = 'PciVirtIO'
    cxx_header = 'dev/virtio/pci.hh'

    vio = Param.VirtIODeviceBase(VirtIODummyDevice(), "VirtIO device")

    VendorID = 0x1AF4
    SubsystemVendorID = VendorID;
    DeviceID = 0x1000

    ClassCode = 0xff # Misc device

    BAR0 = 0x00000001 # Anywhere in 32-bit space; IOREG
    BAR0Size = '0B' # Overridden by the device model

    InterruptPin = 0x01 # Use #INTA
